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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Water solubility

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Reference
Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Study period:
January 1998- April 1998
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
The test was conducted following OECD Guideline 105, EEC directive A.6 and ,,Richtlinien fiir die Prüfung von Pflanzenschutzmitteln im Zulassungsverfahren Teil I, 1-2, B/7, 26".
Qualifier:
according to guideline
Guideline:
OECD Guideline 105 (Water Solubility)
Deviations:
yes
Remarks:
The quantity of test substance in the main test to saturate the used volume of water was lower than 5 of the amount determined in the preliminary test because in higher concentrations of the test substance the volume of supernatant water was too low
GLP compliance:
yes
Type of method:
flask method
Water solubility:
317.76 g/L
Temp.:
20 °C
pH:
9.7
Remarks on result:
other: Determination of saturation concentration of the test item calculated by the response of 2-Hydroxy-2-sulfinato acetic acid, disodium salt
Water solubility:
125.76 g/L
Temp.:
20 °C
pH:
9.7
Remarks on result:
other: Determination of saturation concentration of the test item calculated by the response of 2-Hydroxy-2-sulfonato acetic acid, disodium salt
Water solubility:
727.41 g/L
Temp.:
20 °C
pH:
9.7
Remarks on result:
other: Determination of saturation concentration of the test item calculated by the response of sodium sulphite
Water solubility:
316.7 g/L
Temp.:
4 °C
pH:
9.7
Remarks on result:
other: Determination of saturation concentration of the test item calculated by the response of 2-Hydroxy-2-sulfinato acetic acid, disodium salt
Water solubility:
137.7 g/L
Temp.:
4 °C
pH:
9.7
Remarks on result:
other: Determination of saturation concentration of the test item calculated by the response of of 2-Hydroxy-2-sulfonato acetic acid, disodium salt
Water solubility:
428.66 g/L
Temp.:
4 °C
pH:
9.7
Remarks on result:
other: Determination of saturation concentration of the test item calculated by the response of sodium sulphite
Details on results:
The solubility of the test item at 20 °C was determined to be 125,760 mg/L.
This means that 125.76 g of the test item will be dissolved completely in water.
The sustance is considered to be "very soluble".

Since the test item is a multi-cosituent substance, the other solubilites by reponse of the components also have been determined

 Solubility (average values)     Na2[SOO-CHOH-COO]     Na2[SOOO-CHOH-COO]     Na2SO3
 in g/L (at 20 °C)  317.1  125.8  727.4
 in g/L (at 4 °C)  316.7  137.8  428.7

The mean pH of the saturated solution at 20 °C was determined to be 9.68. The mean density at 20 °C was 1.2678 g/mL.

The mean pH of the saturated solution at 4 °C was determined to be 9.72. The mean density at 20 °C was 1.2165 g/mL.

Conclusions:
Interpretation of results (migrated information): very soluble (> 10000 mg/L)
The solubility of the test item at 20 °C is 125.76 g/L
Executive summary:

The solubility of the test item at 20°C was 125.76 g/L. This means that 125.76 g of the test item will be dissolved completely in 1 L water.

The solubility of the main constituent, 2-Hydroxy-2-sulfinato acetic acid, disodium salt at 20 °C was determined to be 317.8 g/L.

Description of key information

The solubility of the test item at 20°C was 125.76 g/L .The substance is considered to be "very soluble".

Key value for chemical safety assessment

Water solubility:
125.76 g/L
at the temperature of:
20 °C

Additional information

The solubility of the test item at 20°C was 125.76 g/L. This means that 125.76 g of the test item/L will be dissolved completely in water.

The solubility of the main constituent, 2-Hydroxy-2-sulfinato acetic acid, disodium salt at 20 °C was determined to be 317.8 g/L.